The PG-13 thriller, a nod to Alfred Hitchcock’s “Rear Window,” captured the younger market and killed the competition over the weekend, according to studio estimates released yesterday.

The film hit No. 1 with a three-day total of $23 million – which was double that of another debuting thriller, the R-rated “Perfect Stranger” with Bruce Willis, said Jeff Bock, an analyst with box office tracker Exhibitor Relations.

The strong “Disturbia” opening positions its 20-year-old leading actor, Shia LaBeouf, as “the next big thing,” said Bock.

“He’s the star of today with this gross,” said Bock, noting that LaBeouf has some big roles in three upcoming films, “Surf’s Up,” “Transformers” and the fourth Indiana Jones movie.

“There’s definitely a changing of the guard at the box office when a Bruce Willis film [“Perfect Sranger”] opens at No. 4 and Shia LaBeouf is No. 1,” Bock added.

Figure-skating laugher “Blades of Glory” came in second, with a three-day take of $14.1 million.

“Meet the Robinsons” was bumped to third, with $12.1 million. “Perfect Stranger,” with Halle Berry and Willis had a “pretty weak” opening in fourth, with $11.5 million, said Bock.

And Ice Cube’s “Are We Done Yet?” remained in the top five, with $9.2 million.